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针对高速水流脉动压强负值会增大泄流边界发生空蚀破坏的问题,提出一种新型齿墩状内消能工,采用物理模型试验分析了3种齿墩形内消能工的消能特性、脉动压力特性和空化特性。结果表明,采用齿墩设施可增进消能作用并达到消能效果。通过对3种不同面积收缩比的齿墩形内消能工脉动压强研究,得到了脉动压强的分布规律,收缩面积比为0.451时的齿墩形内消能工脉动强度较小,抗空化性能更强,其脉动压强最大点的压强概率密度分布接近正态分布。
Aiming at the negative pressure fluctuation of high-speed water flow, the problem of cavitation damage on the discharge boundary will be increased. A new type of internal energy dissipater is proposed. The energy dissipation of three types of internal energy dissipators is analyzed by physical model test Characteristics, pulsating pressure characteristics and cavitation characteristics. The results show that the use of gear pier can improve energy dissipation and energy dissipation effect. The distribution of pulsating pressure was obtained by studying the pulsating pressure of three kinds of internal energy dissipators with different area shrinkage ratios. The pulsating strength of the internal energy dissipator with small constriction was smaller when the shrinkage area ratio was 0.451. The performance is stronger, the pressure probability density distribution of the maximum point of pulsatile pressure is close to the normal distribution.